Seat-lock.



No. 754,173. PATENTEID MAR. s, 1904.

H. G. SWAN. SEAT LOCK.

APPLICATION FILED SEPT. 19, 1903. N0 MODEL.

' llllfllllllfifuw *7 Q} N v Q V V WITNESSES ENTO rm: NGRRIS F'iTERS co.wofo umn msummom upv UNITED STATES I Patented March 8, 1904.

HENRY O. SWAN, OF CLEVELAND, OHIO.

SEAT-LOCK.

SPECIFICATION forming part of Letters Patent No. 754,173, dated March 8,1904.

I Application filed fieptember 19, 1903. Serial No. 173,758. (No model.)

ing drawings, forming part of this specification, in which Figure 1 is afront elevation, partly broken away, showing my improved device inlocked position; and Fig. 2 is a central side elevation of the same.

My invention relates to the class of locksfor the seats or boards ofvehicles, and it is designed to provide a simple, effective, and cheapdevice of this character; also, to provide for quick and automaticaction of the locking device when the seat is adjusted in place.

In the drawings, 2 represents the seat-riser, and 3 the body or board towhich the seat-riser is locked. The locking device comprises ariser-strap 4:, which is rigidly secured by screws or other devices tothe seat-riser. The lower end of this riser-strap projects below theseat-riser, has a square lower end 5 and an intermediate notch 6 at oneside. The bodystrap 7 is provided with a recess or opening.

at one end, and within this open end is pivoted a cam-lever 8, thesecuring-screw 9 extending through the strap and cam and into the body.The cam is provided with a shoulder 9, which when the cam-lever hangsdown under the action of gravity will project into the opening of thestrap and be engaged by the lower square end of the riser-strap when itis pushed down into the opening in the body-strap. The bodystrap isprovided with a projecting lug or lip 10, which overhangs the inner endof the opening for the riser-strap.

' 1n assembling the parts the riser-strap is .pushed down through theopening in the bodystrap and as it engages the shoulder on the cam itrotates the cam-lever until it assumes the horizontal position shown indotted lines in Fig. 1. The seat-riser is then moved endwise until theshoulder formed by the notch in the riser-strap engages the overhanginglip or shoulder on the body-strap. As this is done the cam-lever dropsdown into locking position by the action of gravity, and it may beassisted by hand, if desired. The lever remains in this position by theaction of gravity and holds the seat or top board securely in place. Itwill be noted that the lower end of the riser-strap is square, and thissquare end must drop ofi' the end of the opening in the body-strap.before it engages the cam, thus forming a guide to direct the downwardmovement of the riser-strap, bringing it to the right point toaccomplish the results.

The advantages of my invention result from the simplicity and cheapnessof the device and the eflicient locking action afforded. The mereforcing of the parts into position automatically locks them through theengagement with the locking-cam and the action of gravity.

The device may be employed for locking the top boards of wagons or forseats,and many changes may be made in the form and arrange ment of theparts without departing from my invention.

I claim 1. In a seat-lock, ariser-strap having a projecting lower endwith a side shoulder, abodystrap having an opening with an upperoverhanging shoulder, and a cam-lever arranged to automatically open andthen move the shoulders in locking engagement; substantially asdescribed.

2. In a seat-lock, a riser-strap having a side notch or shoulder and abody-strap having an opening with an overhanging shoulder on one side,and a locking-cam on the other side, said locking-cam having a shoulderarranged to be engaged by the lower end of the riser-strap, to rotatethe cam; substantially as described.

3. In a seat-lock, a riser-strap having aprojecting-lower end with aside shoulder, a bodystrap having an opening with an upper overhangingshoulder at one end, and a weighted gravity cam-lever at the oppositeside of the opening and arranged to open automatically when theriser-strap is inserted and then move ters the opening in thebody-strap; substanthe shoulders into locking engagement; substantiallyas described.

4. A seat-lock comprising a riser-strap having a side shoulder, abody-strap having an opening with a shoulder at one side, and steamleverat one side of the opening and arranged to automatically open When theriser-strap entially as described. 10

In testimony whereof I have hereunto set

